Improvement in gas-making apparatus



A. MALAM.

Gas-Making Apparatus'.

N NITED STATES PATENT OFFICEo ABRAHAM MALAM, 4OF DUMFRIES, SCOTLAND, ASSIGNOR TO HIMSELF, THOMAS FERGUSON SMITH, AND ROBERT ARMSTRONG, OF SAME PLAGE.

IMPROVEMENT IN GAS-MAKING APPARATUS.

Specification forming part of Letters Patent No. 156,029, dated October 20, 1874; application tiled July 30, 1874.

To all whom it may concern:

Beit known that I, ABRAHAM MALAM, of Dumfries, in Scotland, have invented certain Improvement-s in Gas-Making Apparatus, of which the following is a specification:

My invention has for its object to overcome some of the greatest difficulties that have hitherto atten ded attempts to obtain increased quantities of gas from coal by employing higher heats than those in prevalent use.

It has been Well understood that 'a better yield of gas would be satisfactorily obtainable by raising the heats, were it not that with ordinary apparatus increased heats lead to so much deposition of earthy and adherent matter in the ascension or eXit pipes leadingfrom the retorts as to frequently choke those pipes, and necessitate interruptions in the working, thereby incurring serious inconvenience and loss.

By my present invention I overcome the difiiculties referred to by providing apparatus or means whereby the exit-pipe and the mouthpiece of the retort are kept in a comparatively cool state, and this has the effect of preventing the inconvenient adherence of matters to the inside of the exit-pipe and mouth-piece.

The accompanying drawing comprises, Figure 1, a front elevation, and Fig. 2 a longitudinal vertical section, showing the application of my improved apparatus to a common form of gas-retort.

The retort or the main body 1 of it is shown as of ireclay; but it may be of cast-iron, if preferred. At one end an ordinary monthpiece, 2, is fitted, and the retort is charged and drawn at this end, While at the other end there is tted to it a mouth-piece, 3, which is, by preference, of malleable cast-iron, and which has the exit or ascension pipe 4 attached to it. The ascension-pipe 4 leads, in the usual way, by branches 5 6, into the hydraulic main 7. Atrough or casing, 8, is formed on the mouthpiece 3, and round the lower part ot' the exitpipe 4, and is kept illed or partly filled lwith water. The pipe 4 is cooled, and deposition in it prevented by introducing a small regulated quantity of water into its interior by a pipe, l0, the water being spread by first falling on a disk, 11, so as to wash down the sides of the pipe. In order that the mouthpiece 3 may not be filled up by deposited matters washed down from or prevented from entering the exit-pipe 4, an outlet is formed in the bottom of the mouth-piece, and communicates, by a pipe, 13, with a receiving-trough, 14, which is always kept sufciently filled with water to seal the end of the pipe 13.

The improvements hereinbefore described can easily be applied to various forms or kinds of retorts; and, When the retort is single, or such as to open at one end only, the pipe 13 maybe covered by a plate during drawing and charging.

I claim- 1. The combination of the water-pipe 10 and spreader 11 with the ascension-pipe 4, in the manner and for the purpose herein set forth.

2. The combination of the ascension-pipe 4 with the mouth-piece 3, water-trough 8, outlet-pipe 13, and trough 14, in the manner and for the purpose herein set forth.

ABRAHAM MALAM.

Witnesses:

EDMUND HUNT, JOHN JENKINS. 

